/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import javax.servlet.http.HttpSession;
import model.pojo.*;
import model.dao.*;

/**
 *
 * @author VuTienIT
 */
public class DangNhap extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        HttpSession session = request.getSession();
        response.setContentType("text/html;charset=UTF-8");
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        request.removeAttribute("Error");
        String page = request.getParameter("Page");
        String action = request.getParameter("Action");
        
        // Tạo Session đăng nhập cho khách hàng
        KhachHangPOJO ssDangNhap = null;
        if(session.getAttribute("KhachHang")==null)
        {
            ssDangNhap = new KhachHangPOJO();
            session.setAttribute("KhachHang", ssDangNhap);
        }
        else
        {
            ssDangNhap = (KhachHangPOJO)session.getAttribute("KhachHang");
        }
        
        ArrayList<PhieuPOJO> dsKMt = PhieuDAO.getDanhSachKMHnay3();
        request.setAttribute("PhieuKM", dsKMt);
        ArrayList<DanhMucPOJO> danhMucs = DanhMucDAO.getDanhSach();
        request.setAttribute("DanhMucS", danhMucs);
        
        if(action==null)
        {
            request.getRequestDispatcher("/DangNhap.jsp").forward(request, response);
        }
        else
        {
            //Đăng nhập
            if(action!=null && action.equals("Login"))
            {
                String username = request.getParameter("username");
                String password = request.getParameter("password");
                ssDangNhap = KhachHangDAO.DangNhap(username,password);
                if(ssDangNhap.getTenTruyCap()!=null)
                {
                    session.setAttribute("KhachHang", ssDangNhap);
                    response.sendRedirect("home?Page=View");
                }
                else
                {
                    String url = "home?Page=lg";
                    request.setAttribute("Error", "Tên đăng nhập hoặc mật khẩu không đúng");
                    request.getRequestDispatcher(url).forward(request, response);
                }
            }
            //Đăng xuất
            if(action!=null && action.equals("Logout"))
            {
                session.removeAttribute("KhachHang");
                response.sendRedirect("home?Page=View");
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
